{"id":719,"date":"2019-03-27T16:21:57","date_gmt":"2019-03-27T15:21:57","guid":{"rendered":"https:\/\/www.jauch.com\/blog\/?p=719"},"modified":"2025-07-09T08:22:36","modified_gmt":"2025-07-09T06:22:36","slug":"tuning-fork-crystal-frequency-32768-khz","status":"publish","type":"post","link":"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/","title":{"rendered":"Why Do Tuning Fork Crystals Always Have A Frequency of 32.768 kHz?"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"537\" src=\"https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz-1024x537.png\" alt=\"Nahaufnahme eines Uhrenquarzes\" class=\"wp-image-721\" srcset=\"https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz-1024x537.png 1024w, https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz-300x157.png 300w, https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz-768x403.png 768w, https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz-280x147.png 280w, https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz.png 1196w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>The tuning fork crystal as it is used in watches is something like the &#8220;classic&#8221; among the quartz crystals. Its frequency is always exactly 32.768 kHz. But why this value?<\/p>\n\n\n\n<p>The answer to this question can be found in the history of quartz crystals. Bell Telephone Laboratories, the former research department of today&#8217;s telecommunications group AT&amp;T, is one of the pioneers in this field. Initially, their research focused on stabilizing radio frequencies, but it soon became clear that quartz crystals are also useful for time measurement. In 1928, the Americans proudly presented the world&#8217;s first quartz-controlled Clock.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Tuning Fork Crystal Sets New Precision Standards<\/h2>\n\n\n\n<p>Before this breakthrough, all clocks worked purely mechanical. By installing the quartz crystal and a corresponding energy source that makes the quartz oscillate, an electronic component was introduced for the first time. And it worked: The new quartz watch ran much more precisely than the purely mechanical competition.<\/p>\n\n\n\n<p>But what function is actually fulfilled by the quartz crystal? Put simply, the quartz crystal ensures that the watch &#8220;knows&#8221; how long a second lasts. This is achieved by generating a frequency of exactly one Hertz. Hertz is the common unit of measurement for frequencies. It indicates the number of repetitive processes per second in a periodic signal; in this case the advancement of the second hand by one position on the clock-face.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Output Frequency of 32.768 kHz?<\/h2>\n\n\n\n<p>Where does the unique standard frequency for a tuning fork crystal of 32,768 Hertz originate? To understand this, you must know that the frequency of a quartz crystal depends on its shape and size. A quartz with a natural frequency of only one Hertz would be so large, it would be more suitable for the \u201cBig Ben\u201d clock tower than for a wrist watch. Obviously, that would be rather impractical in terms of production and use so there&#8217;s a special trick.<\/p>\n\n\n\n<p>Watch crystals with a frequency of 32.768 kHz are relatively easy to produce. Built into the watch, its original frequency is split using so-called T-flipflops or ripple counters. Each T-flip-flop can halve the frequency of the quartz. If 15 of these T-flipflops are connected in series, the output frequency of 32.768 kHz equals exactly one Hertz. Thus, the frequency of the classic Tuning fork crystal is ultimately the result of a simple arithmetic operation and the general conditions of quartz production.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Precise Frequencies for the Mass Market<\/h2>\n\n\n\n<p>Several decades passed before the quartz watch finally found its way into the mass market. In 1969, the Japanese company Seiko launched the first commercially available quartz wristwatch on the market. However, the cost of 460,000 Yen was equivalent to that of a small car. But development was rapid: By the mid 1970s, quartz watches were already cheaper than &#8220;conventional&#8221; watches with purely mechanical movements.<\/p>\n\n\n\n<p>At that time, Jauch also seized the opportunity and built up its own trade- and production-network for tuning fork crystals and further frequency control products. Naturally, tuning fork crystals are still <a href=\"https:\/\/www.jauch.com\/en-INT\/products\/frequency_control_components\/getPrm\/Quartz%20Crystals\/SMD%20TUNING%20FORK\/\" target=\"_blank\" rel=\"noopener noreferrer\">part of today\u2019s portfolio.<\/a> However, Jauch is also offering a <a href=\"https:\/\/www.jauch.com\/blog\/en\/the-strengths-of-32-768-khz-oscillators\/\" target=\"_blank\" rel=\"noopener noreferrer\">wide range of oscillators<\/a> with the tuning fork-frequency of 32.768 kHz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The tuning fork crystal as it is used in watches is something like the &#8220;classic&#8221; among the quartz crystals. Its frequency is always exactly 32.768 kHz. But why this value? The answer to this question can be found in the history of quartz crystals. Bell Telephone Laboratories, the former research department of today&#8217;s telecommunications group<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[451,491,489,490,319,173,470,176],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>All You Need to Know About Tuning Fork Crystals &#8211; Jauch Blog<\/title>\n<meta name=\"description\" content=\"The tuning fork crystal as is used in watches is the \u201cclassic\u201d among quartz crystals. Since the 1970s, his frequency has always been at 32.768 kHz. But why?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"All You Need to Know About Tuning Fork Crystals &#8211; Jauch Blog\" \/>\n<meta property=\"og:description\" content=\"The tuning fork crystal as is used in watches is the \u201cclassic\u201d among quartz crystals. Since the 1970s, his frequency has always been at 32.768 kHz. But why?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/\" \/>\n<meta property=\"og:site_name\" content=\"Jauch Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/jauch.com.de\/\" \/>\n<meta property=\"article:published_time\" content=\"2019-03-27T15:21:57+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-09T06:22:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz-1024x537.png\" \/>\n<meta name=\"author\" content=\"Marketing Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@jauch_de\" \/>\n<meta name=\"twitter:site\" content=\"@jauch_de\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Marketing Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/\"},\"author\":{\"name\":\"Marketing Team\",\"@id\":\"https:\/\/www.jauch.com\/blog\/#\/schema\/person\/8465d9007d0bebb1905c676998d3cf85\"},\"headline\":\"Why Do Tuning Fork Crystals Always Have A Frequency of 32.768 kHz?\",\"datePublished\":\"2019-03-27T15:21:57+00:00\",\"dateModified\":\"2025-07-09T06:22:36+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/\"},\"wordCount\":523,\"commentCount\":6,\"publisher\":{\"@id\":\"https:\/\/www.jauch.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz-1024x537.png\",\"keywords\":[\"32.768 kHz\",\"At&amp;T\",\"crystal\",\"crystal quartz\",\"frequnecy\",\"Quartz\",\"tuning fork\",\"watch crystal\"],\"articleSection\":[\"Frequency Control Products\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/\",\"url\":\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/\",\"name\":\"All You Need to Know About Tuning Fork Crystals &#8211; Jauch Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.jauch.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.jauch.com\/blog\/en\/tuning-fork-crystal-frequency-32768-khz\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jauch.com\/blog\/wp-content\/uploads\/2019\/03\/Uhrenquarz-1024x537.png\",\"datePublished\":\"2019-03-27T15:21:57+00:00\",\"dateModified\":\"2025-07-09T06:22:36+00:00\",\"description\":\"The tuning fork crystal as is used in watches is the \u201cclassic\u201d among quartz crystals. 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